Apply preset format to input field

Apply preset format to input field

Apply preset format to input field 

1. How can I set the input to reflect this structure "999-999-9999" The "-" must be preset.
(The user only need to type the digits).

2. The total number of digits will always be 10 digits. Any other command that I can use to replace the "rangelength"

Thank you.
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  1. phoneno: {
  2.                 required: true,
  3.                 digits: true,
  4.                 rangelength: [10,10]   //  numeric always 10 digits
  5.             },